How do i get the latest VPS?
Wait till avast has released the new VPS version then simply update it.
So just open the chest and restore everything that was put in there today?
Only those things that are detected as VBS:Mal-gen need to be restored. If things are deleted because they (for whatever reason) couldn't be placed in the chest, install the application again (or if it has that option, perform a repair of the application)

If data (documents and such) are deleted, either restore them from the chest or retrieve them through recent backup.